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Thesis: Real-Time Spectroscopic Monitoring of Microvias Powering the AI Revolution
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Internship
postgraduate degree
Posted 44d ago
~40 hrs/week
Responsibilities
Develop a real-time, in-line endpoint detection system for microvia drilling using spectral analysis of laser-induced plasma. Responsibilities include aligning optical arrangements, conducting feasibility experiments, and programming an FPGA-based control scheme.
Requirements
The candidate should have the ability to work with laser optics and develop electronic control systems. Proficiency in FPGA programming and experimental investigation is required.
Full job description
In cooperation with the Chair of Laser Technology (LLT), the Fraunhofer Institute for Laser Technology (ILT)—Europe’s leading center for contract research and development in the field of laser technology—is offering the opportunity to write a thesis on the topic: »Real-Time Spectroscopic Monitoring of Microvias Powering the AI Revolution«.
The explosive growth of artificial intelligence is driving an unprecedented demand for high-density interconnect printed circuit boards. Next-generation AI chips require ever finer microvias to connect increasingly thin copper layers through dielectric substrates. Today, CO₂ lasers are the industrial standard for via drilling, but their minimum feature size is physically limited. Ultrashort pulsed lasers offer a path to significantly smaller vias. However, a critical challenge arises: unlike CO₂ radiation, the 515 nm USP beam couples efficiently into copper, meaning the very copper layer that must be preserved is ablated alongside the dielectric. As copper layers shrink to thicknesses below 5 µm, even a single excess pulse can cause irreversible damage. This thesis addresses this challenge by developing a real-time, in-line endpoint detection system. The plasma generated by each individual laser pulse is spectrally analysed to detect the characteristic copper emission—the instant copper is exposed, the process stops. This enabels damage-free microvia drilling at industrial throughputs.
Be part of change
You will set up and align the optical arrangement
Through experiments, you will investigate the feasibility
Then, you will design an evaluation circuit and program a FPGA based control scheme
The objectives of the project will be tailored to your skills and preferences
Komplexe Datenvisualisierung? Wir machen's einfach! Wir setzen seit über 30 Jahren Standards im Visual Computing.
Industry
Research Services
Company size
51-200 employees
Founded
1988
Headquarters
Darmstadt
LinkedIn followers
6,076
Fraunhofer IGD is the international leading institute for applied research in visual computing. Visual computing is image- and model-based information technology and includes computer graphics and computer vision, as well as virtual and augmented reality.
In simple terms, the Fraunhofer researchers in Darmstadt, Rostock, and Kiel are turning information into images and extracting information from images. In cooperation with its partners, technical solutions and market-relevant products are created.
Prototypes and integrated solutions are developed in accordance with customized requirements. In doing so, Fraunhofer IGD places users at the forefront, providing them with technical solutions to facilitate computer work and make it more efficient.
Owing to its numerous innovations, Fraunhofer IGD raises man-machine interaction to a new level. Man is able to work in a more result-oriented and effective way by means of the computer and visual computing developments.
Offices: Fraunhoferstrasse 5, Darmstadt, 64283, DE · Joachim-Jungius-Straße 11, Rostock, Mecklenburg-Vorpommern 18059, DE · Inffeldgasse 16c, Graz, 8010, AT
How many Engineering jobs are open in Aachen, Germany right now?
There are currently 300 open engineering positions in Aachen, Germany listed on Clera. New openings are added daily as companies post roles.
Which companies are hiring for Engineering roles in Aachen, Germany?
Companies currently hiring include Drees & Sommer, Fraunhofer IGD, NEURA Robotics, Black Semiconductor, Voltfang, among others. Browse the listings above to see every active employer.
Are there remote or hybrid Engineering jobs in Aachen, Germany?
Yes — 140 of the 300 open engineering positions offer remote or hybrid work (7 remote, 133 hybrid).
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